Pump



Patented Mar. 6, 1928..

. .UNITED STATES PATENT OFFICE.

RHEUBEN M. CLARK, OF JQPIDIN,` MISSOURI.

PUK?.

Application Hed. Ilmo 4,

This-inventionrelates to pumps and more particularly to a pump especially designed and adapted for use inirrigation.V

An. important objectof the present inventionisY to provide an efficient pumpk of the.

impeller type which` is adapted to be em played Without the use of baffles or similar devices to prevent the generation of centrifugall force.

ing. action by employing impellers of the spiral` type employlng apair of spiral blades which it has been foundf that the centrifugal` motion` usually imparted tothe liquid is: minimized. Y

A further object is to provide means for increasing the pumping actiony by adding t the impellers Without discarding the pump casing.

A further object isto provide a. pump of the character just referred to wherein the casing may be lengthened to accommodate additional -impeller sections when; it is de-r sired to increase the pumping pressure.

Other objects and' advantages oli the invention `Will become appa-rent during the course ofthe following description.

lin` the drawings I have shown several embodiments of the invention. In this show- 1ng:.- i

Figure 1 is a central vertical sectionalview throughloner form of pump.. i

Figure 2 is a sectionI on line 2.-2. of. Figure 1 v Figui-3.1.3` is a similar viewfon line 3-3 of Figure 1,v

Figure 4 is a side elevation of a modified form of pump, parts being broken away,

.Figure 5 isa side elevationo the pump shaftradapted tobe eniployedwith the pump illustrated in` Figure 1.,

Figure 6 is a detail view of a pair of im',- peller sections, t i

.Figure 7 is a. side elevation of. a pump 1927; serial No. 196,565.

shaft adapted to be employed' in connection` with the pump illustrated in Figure 4, and

Figure 8 is a. detail perspective ofV one of the lengthening sleeves.

Referring` to the drawings the numeral 10v designates a pump casi-ng Which has any elongated preferably horizontal upper por* tion 11 provided in its center with an outlet, opening 12. An outlet pipe 13 may be threaded in; aflangelel secured to the casing by bolts or the'lil'rel 15. The elongated( por tion of the.- pump casing is provided' with a central cylindrical yportion 16,asl lclearly shown in liligures` 1 and 2. The casingk is further provided with a, depending portion-y 17 having a cent-ralA inlet opening 18. The lower end@ of the extension 17 is flanged as at 19 and an attaching flange-20 may be bolted thereto.7 asv at 21. An inlet pipe 22 is threaded or otherwise secured to the flange 20,. The upper portionsy ofthe lower extension 1.7 are provided with* passages 23 through which Water or other liquid is adapted to be supplied to theinterior of the cylinder 16 in a manner. to be described.

Each` endjfof the casing is provided with extensions 2.4 forming continuations thereof and ahead'25 is arrangedy against the outer end of' eachv extension 24. yThe heads andext'ensions maybe secured'v tothe casing by: bolts 26 `as shown in Figure 1. Each end portion of the casing is provided with an annular recess 27: in'which is seatedthe inner end of an extension sleeve-283` each sleeve forming an extension of the cylindrical? por-v the outer end', of eachv extension 28- contacts with4 the; inner end" of one of the extensions 24 whereby it is l maintained in position. Each of the heads is` provided withl an inner axialr extension 2`9fin which is arranged a babbitt or similar bearing- 30;

, A` pump'shaft indicated' as a Whole by the numerall is mounted to rotate in the bearings. As shown in Figure 5,` the pump shaft isprovided with an enlarged central portion 32 ateach side of Whicht'here is provided a slightly reduced 'threaded portion 33 of substantiallength. One end of the shaft `is further provided' WithV a relatively short cytion 16, as will' be apparent.. Aportion of n lindrical extension 84 which is slightly smaller than the adjacent threaded portion 33, and the extension 34 is journalled in one of the bearings 29, as shown in Figure 1. A plug having an opening therethrough, is threaded in the adjacent head 25, and an oil cup Bti is adapted to supply lubricant to the adjacent bearing. The opposite end of the shaft is provided with a relatively long extension 37 which extends through the adjacent head 25 for connection with a suitable power source. rlhe last named head Q5 may be provided with suitable packing 38 maintained in position by a gland 3) and a lubricant cup 4t) is adapted to supply oil or grease to the shaft. A bearing bracket 41 is secured to the adjacent head 25 and has an upstanding portion 4Q provided with suitable hall bearings 43. These bearingsl are provided to minimize lateral pull on the packing gland and adjacent bearing 30 when the device is in operation aml the shaft 37 is belt driven.

Referring to Figures 1 and (i, the numeral t4 designates a plurality of impeller sections adapted to be mounted on the shaft 3l. Each impeller section includes a hub 45 and a pair of spiral blades 4S similar in const ruetion to the, spiral ribs of an ordinary auger. It will be apparent that the blades of each impeller section are oppositely arranged at each point throughout their length. ln the l'orm o t' the invention described the length of each threaded section 33 of the shaft 32 is suflicient to acconnnmlate two ofthe irnpeller .sections 44, the hubs of these sections being threaded in place. Gbviously two of the sections are mounted on each threaded portion 53. and the. inner ends of the inner impeller sections seat against the shoulders formed at the ends of the central shaft. portion 32. Gutward movement of the impeller section is prevented by the inner ends of the head 'eX- tension 29. It will be apparent that the blades of thc impeller sections arranged on the two shaft portions 33 are oppositely pitched.

The casing and most of the other elements illustrated in Figure 4 of the drawings are identical with the corresponding elements previously described and need not be referred to in detail. In this form of the invention it will be noted that the sleeves 28 and easing extensions E24 have been eliminated and the heads 9.5 are secured directly against the ends of the easing, it merely being necessary7 to employ shorter bolts E2G. In the modified form of the invention, the shaft 31 is provided with a relatively short threaded section 49 in place of the threaded portion 33, the threaded portion 49 being equal in length to one of the impeller sections 44. In this form of the invention, therefore, it will be apparent that only one of the impellers is employed on `each end of the shaft 31.

1t it is desired to use only one side of the pump, one of the extensions Q8 may be seated in the recess 27 and may contact at its outer end with the adjacent head 25, as illustrated in dotted lines in Figure 4.

The operation of the device is as follows:

lt has been found that the pump construction illustrated in Figure 4 is very eticient in operation and only a slight degree of centrifugal force is generated owing to the use of the type of impeller employed. The pump is operated by driving the shaft 37 from any suitable source of power. Water or other liquid is drawn into the casing eX- tension 17 through the inlet pipe 28 and tiows into the cylinder 1G through the passages 2T and the spaces provided between the heads and the ends of the cylinder 1G. As previously stated. the impeller sections on opposite ends ot the shaft are oppositely pitched, and it will be apparent therefore that rotation oi' th(` .shaft is adapted to pump water toward the center of the cylinder l, and thence outwardly through thev opening 1Q and outlet pipe 13.

It it. is found that an additional pumping head is necessary or desirable` the capacity ot the pump readily may be increased without discarding anything but the pump shaft. The heads 25 in the t'orm ot the invention illustrated in Figure 4, may be removed and the shaft witlulrawn. whereupon the shaft 3l illustrated in Figure 5 may be substituted. This shal't is adapted to accommodate two ot the impeller sections as previously stated. One of the extensions 28 is then arranged iu each recess QT and the heads may be replaced and one of the casing extensions 24 arranged against each end ot' the casing. The shaft and heads then may be replaced. when the pump is ready for operation. lVith a plurality of ilnpeller sections mounted on each end of the shaft 3l, it will be apparent that a greatly increased pressure head may be obtained. Obviously, the device is not limited to the use of two impeller sections, it heilig apparent that a longer shaft, and longer extensions Q4 and Q8 may be en'iploycd whereby any desired number of impeller sections may be used. lVhen the form of the pump shown in Figure 4 is employed, and a decreased pumping action is desired, one of theheads Q5 may be removed and one of the sleeves` QS placed in posit-ion as shown in dotted lines in Figure 4. As is well known, an increased pumping action where desired` usually can he obtained only by discarding a pump and replacing it with one of greater capacity. lVith the present invention. however, the increased pumping action readily may be obtained in the manner stated without replacing any of the parts except the .shaft 31.

It is to he understood that the forms of llt) lig-6641,36()

adjacent portions of the casing `to providel inlet passages through which liquid is adapted to flow into the ends of the cylinder, said casing being provided with an outlet opening communicating with said cylinder centrally thereof, a shaft rotatably mounted in said casing andV extending 'axially through said cylinder, a pumping element mounted on said shaft on each side of said outlet opening and rotatable in said cylinder, means for elongating said casing axially of said shaft to accommodate an additional pumping element adjacent each of said first named pumping elements, and means for elongating said cylinder at opposite ends'to receive such additional pumping elements.

Q. A pump comprising a casing including a cylinder having its ends spaced fioin the adjacent ends of the casing to provide passages through which fluid is adapted to flow into the ends of said cylinder, said casing being provided with an outlet opening communicating with said cylinder centrally thereof, a pair of heads mounted on opposite ends of said casing, bearings carried by said heads in axial alinenient with said cylinder, a shaft j ournalled in said bearings and extending through said cylinder, a pair of pumping elements carried by'said shaft on opposite sides of said outlet opening, extension members adapted to be ar-v ranged between said heads and the adjacent portionsof said casing,` and means for extending said cylinder at opposite ends to accommodate additional pumping elements adapted to be mounted on said shaft adjacent said rst named pumping elements.y

3. A pump comprising a casing having a horizontally elongated upper portion, a cylinder forming a part of said casing and arranged in the elongated portion thereof, said casing being provided with au outlet opening communicating withsaidV cylinder centrally thereof and being further provided with an inlet opening, the ends of said cylinder being spaced from adjacent portions of said casing whereby t-lie ends of the cylinder are adapted to communicate with said inlet opening, spaced bearings carried by said casing in axial alinement with said cylinder and spaced from the ends thereof, a shaft journalled in said bearings and extending through said cylinder, pumping elements carried by said y shaft on opposite sides of said outlet opening, and means for spacing saidl :bearings av greater` distance apartto accommodate additional pumping elementsion said! shaft adjacent andY outward# ly of. saidfirst named? pumpingl elements.

4. A pump= comprising a: casing having a horizontally elongated upper portion, a

cylinder forming a. part of `said casing and y arranged inithe elongated portion-thereof, said' casing beingpro'vided with an` outlet opening'communicating with said cylinder centrally thereof and being furtherprovided beneath said cylinder with an inlet opening, the ends of said cylinder being spaced from adjacent portions of said ycasing whereby the ends of the cylinder are adapted to communicate with said inlet opening, heads car` ried by said casing outwardly of the ends of said cylinder, bearings ca rriedby said heads axially of` said cylinder, a shaft journalled in said bearings and extending through said e cylinder, pumping elements mounted on said shaft on opposite sides of said outlet open# ing, and extension members adapted tobe mounted between-said heads and the adja-` cent portions of said casing to accommodate additional pumping elements onk said shaft adjacent said first named vpumping' elements.

5. A pump comprising a casing having a horizontally elongated upper portion, a cylinder forming a part of said casing and arranged in the elongated portion thereof, said casing beingprovided with an outlet open` ing communicating with said cylinder cen-l trally thereof and being further provided with an inlet opening, the ends of said cyl iiidei beingV spaced from adjacent portions of said casing whereby the ends of the cylinder are adapted to communicate with saidy inlet opening, heads carried by said casing outwardly of said cylinder', bearings carried by said heads in axial alinenient with said cylinder, a shaft journalled insaid bearings and extending through said cylinder, spiral pumping elements carried by said shaft on opposite sides of said outlet opening and rotatable in said cylinder,.-casing extension vmembers adapted to be arranged between said heads and said casing, and sleeves adapted to be arranged atopposite ends of Said cylinder to form continuations thereof.

6.A pumpcomprising a casing having a horizontally,elongated upper portion, a cylinder forminga part of said casing and arranged in the elongated portion thereof, said casing being provided with an outlet opening communicating with said cylinder cen' trally thereof Yand being further provided with an inlet opening, the endsv of said cyl- `inder being spaced from the adjacent portions of lsaid casing rwhereby the ends of the cylinder are adapted to communicate with said inlet opening, heads carried by said casing .outwardly of said cylinder, bearings carried by said heads in axial alinement with said cylinder, a shaft adapted to l0 portion of' said casing, said casing being provided with an annular' rrecess arranged concentric with said cylinder at each end thereof, and a sleeve adapted to be inserted in each of said recesses to form a continuation of said cylinder, the outer end of each 15 of said sleeves being adapted to Contact with one of said casing extension members.

In testimony whereof I affix my signature.

RHEUBEN M. CLARK. 

